Process for recovery of phosphate ore

Classifying – separating – and assorting solids – Fluid suspension – Liquid

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252 61, B03D 114

Patent

active

045114633

ABSTRACT:
Phosphate ore is concentrated by flotation in the presence of a half-ester of an organic dicarboxylic acid, such as maleic acid, with a saturated aliphatic alcohol containing at least 11 carbon atoms. Water and oil also are present. The half-ester may be partly neutralized, e.g. with caustic soda, in an amount at most sufficient to raise the pH to 7.0.

REFERENCES:
patent: 2099120 (1937-11-01), Kirby
patent: 2120217 (1938-06-01), Harris
patent: 2312466 (1943-03-01), Erickson
patent: 4081363 (1978-03-01), Grayson
patent: 4148720 (1979-04-01), Wang
patent: 4200522 (1980-04-01), Dorrepaal

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